Hardware Selection

Confirm the board's chip, Flash and PSRAM before selecting the matching FastBee environment. Do not choose by feature count: the release baseline uses runtime switches and a memory budget.

Boards and Environments

Chip / Module	Environment	Typical Use
Classic ESP32, 4MB, no PSRAM	esp32-F4R0	GPIO, basic sensors, WiFi/MQTT
Classic ESP32, 8MB, no PSRAM	esp32-F8R0	OTA-capable WROOM node
Classic ESP32, 8MB + 8MB PSRAM	esp32-F8R8	WROVER gateway/cache
ESP32-C3, 4MB, no PSRAM	esp32c3-F4R0	Low-cost WiFi node
ESP32-C6, 4MB, no PSRAM	esp32c6-F4R0	WiFi 6 node
ESP32-C6, 8MB, no PSRAM	esp32c6-F8R0	WiFi 6 OTA node
ESP32-S3, 8MB, no PSRAM	esp32s3-F8R0	S3 OTA node without PSRAM
ESP32-S3, 8MB + 8MB PSRAM	esp32s3-F8R8	OTA, displays, rules and more peripherals
ESP32-S3, 16MB + 8MB PSRAM	esp32s3-F16R8	Large gateway, cellular/Ethernet and heavier Web pages

These are the nine release environments. F is Flash and R is PSRAM; standard names no longer use F8R4. Flash determines the partition and OTA capability, while PSRAM provides headroom for MQTTS, display buffers and concurrent peripheral work.

Common Modules

Module	Interface	Peripheral Type
LED/relay/buzzer	GPIO output	12
Button/door sensor/PIR	GPIO input	11/13/14
Light/soil/voltage/current	ADC	15
DHT11/DHT22, ultrasonic	GPIO	38
DS18B20	OneWire	44
SHT31/AHT20/BH1750/BMP280/MPU6050	I2C	38 + sensorCategory
OLED/SH1106, LCD1602	I2C	36/52
TM1637	Two GPIO pins	47
WS2812B	One GPIO pin	45
RFID MFRC522	SPI	Sensor driver parameters
RS485 slave device	UART + transceiver	51 / Modbus page
Servo/stepper motor	PWM/GPIO	41/42

See Peripheral Reference for all types and parameters.

Selection Advice

• A 4MB environment is sufficient for GPIO and a few sensors, but it has no OTA.
• Prefer esp32s3-F8R8 for OTA, MQTTS, scripts, displays or many peripherals.
• Use esp32s3-F16R8 for larger configuration/log space or products with cellular/Ethernet hardware.
• Before using W5500, EC801E-CN or RS485, verify the power rail, logic levels, UART/SPI pins and cooling.

Pin and Power Safety

• Avoid pins reserved for Flash/PSRAM, USB/JTAG, BOOT and the download UART. Always follow the exact board schematic.
• Classic ESP32 GPIO34-39 are input-only. Prefer ADC1 because ADC2 is constrained while WiFi is active.
• I2C needs pull-ups and unique addresses.
• Relays, servos and cellular modules may need a separate regulated supply and common ground. Isolate mains-voltage loads.
• Save a peripheral as disabled first. Verify a single read/write operation before adding automatic rules.

Purchase and Verify

1. Confirm chip, Flash and PSRAM from the module marking or board specification.
2. Select the matching Hardware and Environment.
3. After flashing, verify hardware in /api/system/info and features in /api/features/status.
4. Add one peripheral at a time so wiring and configuration faults remain easy to isolate.